War against disease

Explores humanity's war with lethal microorganisms and viruses, including SARS and AIDS. Images by medical photographer Lennart Nilsson show how microbes attack the body and how our immune systems defend it. Includes reenactments of medical discoveries: penicillin, blood groups, methods of malaria control, and the polio vaccine. The rapid speed with which the SARS virus spread around the globe is also investigated. Leading immunologist Robert Gallo urges awareness to prevent these mounting threats.